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OPERATION

5916 - 195th Street N.E.

Arlington, WA 98223

Telephone: 360/435-8826

Fax: 360/435-2229

www.traceengineering.com

PS Series Inverter/Charger

Part No. 3597

Rev. D: November 23, 1999

Page

LOW BATTERY PROTECTION

When the actual battery voltage reaches the LOW BATTERY CUT OUT menu item setting for the LBCO

DELAY period, the inverter shuts off to prevent the battery from being over-discharged. If the inverter is

setup to automatically start a backup generator (Gen Auto Start Menu), then it will start once the battery

reaches the LBCO setting for the selected time (30 seconds, etc).

Any of the following three conditions will return the inverter to normal operation:

1. Power is applied to the AC HOT IN input terminals, allowing the inverter to operate as a battery

charger.

2. The inverter is manually restarted by pushing the red ON/OFF button and selecting OFF and then

SRCH or ON.

3. Battery voltage rises above the SET LOW BATTERY CUT IN menu item setting.

While the inverter is shut off due to the battery reaching the LOW BATTERY CUT OUT settings, the red

ERROR LED will be illuminated. When the battery voltage increases to the LOW BATTERY CUT IN

setting, the inverter will automatically turn back on and the ERROR LED will turn off.

ADJUSTING THE LOW BATTERY PROTECTION (USING THE SWRC)

There are three setting which are used to prevent overdischarge of the battery. These settings are

located under the INVERTER SETUP (9) menu heading. See the SETUP MENU section for instructions

on accessing these settings.

The SET LOW BATTERY CUT OUT menu item determines the voltage level that the battery must reach

for it to be considered low. The inverter will continue to operate until the voltage has continuously

remained below this setting for the time period from the SET LBCO DELAY menu item. Once the inverter

has shut off, the battery voltage must rise above the value from the SET LOW BATTERY CUT IN menu

item.

The default LOW BATTERY CUT OUT setting may be lower than what is often recommended for many

applications by battery manufacturers. It is set to allow maximum performance from the inverter, not to

maximize the life of the battery. If the system is properly designed, the inverter should not reach the

LBCO setting very often. If the system is expected to utilize the LBCO control on a regular basis, then

increasing this setting is recommended.

Trace Engineering PS Series User Manual

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